From patchwork Fri Aug 4 15:47:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 13342051 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 57B65C04A6A for ; Fri, 4 Aug 2023 15:48:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232041AbjHDPs3 (ORCPT ); Fri, 4 Aug 2023 11:48:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231843AbjHDPs2 (ORCPT ); Fri, 4 Aug 2023 11:48:28 -0400 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED2FA1734; Fri, 4 Aug 2023 08:48:27 -0700 (PDT) Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-686be28e1a8so1659091b3a.0; Fri, 04 Aug 2023 08:48:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691164107; x=1691768907; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Svmb7vUiQmGpYLaHTeg+6W6igOZUZG/FFgL7GRXZI1U=; b=i51oxKM6fRYH2e9VyJNsFQej7LS7yCsG85gDLfVlx0v3urc34J94nvbMH4JH/sDH7Y I7r1WWPTyJMoljSS6kV2iD6ub4o6rKo1RZmq8yVHAM1fVTssftFidzHsGY7MR8XCLMZe DVNISVTP99EgX/q5Jl/dR3hjoYSq8bMhPCotBgcJFP3nFLWtL7HTD2adF0QwsL2ly+XQ Vmxysq5EaP6qx1/Ui8NPFJ1d/BexoMXlXs/q73CIt4LnIotCOnT/R1JIgsRXHZ8Qkynh 6pv9grcp+m9z7nGxxtzxQdG7IybQnKfuqFJQ4/zXj99Mj8TjLkahiBPAf49NHAxjKtP8 mXLQ== X-Gm-Message-State: AOJu0Yxk8nPieljUdrPiM9qdKHt6KjOErCrHjOdUxx5xweKQ8HKpFymh unuWR/IGgM+nAKEZVS8Nrrk= X-Google-Smtp-Source: AGHT+IExq15j5nygxevyTwWXOpRS7teppJxCEa2JUiqe6jwlhKcAr0bJr87U3hNBal33U0O2Im86zg== X-Received: by 2002:a05:6a21:2703:b0:13f:9dbc:e530 with SMTP id rm3-20020a056a21270300b0013f9dbce530mr1504766pzb.8.1691164107101; Fri, 04 Aug 2023 08:48:27 -0700 (PDT) Received: from bvanassche-linux.mtv.corp.google.com ([2620:15c:211:201:4af5:d063:a66d:403b]) by smtp.gmail.com with ESMTPSA id h8-20020a62b408000000b00640ddad2e0dsm1760839pfn.47.2023.08.04.08.48.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Aug 2023 08:48:26 -0700 (PDT) From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, "Martin K . Petersen" , Christoph Hellwig , Bart Van Assche Subject: [PATCH v6 0/7] Improve performance for zoned UFS devices Date: Fri, 4 Aug 2023 08:47:58 -0700 Message-ID: <20230804154821.3232094-1-bvanassche@acm.org> X-Mailer: git-send-email 2.41.0.640.ga95def55d0-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Hi Jens, This patch series improves small write IOPS by a factor of four (+300%) for zoned UFS devices on my test setup with a UFSHCI 3.0 controller. Please consider this patch series for the next merge window. Thank you, Bart. Changes compared to v5: - Renamed scsi_cmp_lba() into scsi_cmp_sector(). - Improved several source code comments. Changes compared to v4: - Dropped the patch that introduces the REQ_NO_ZONE_WRITE_LOCK flag. - Dropped the null_blk patch and added two scsi_debug patches instead. - Dropped the f2fs patch. - Split the patch for the UFS driver into two patches. - Modified several patch descriptions and source code comments. - Renamed dd_use_write_locking() into dd_use_zone_write_locking(). - Moved the list_sort() call from scsi_unjam_host() into scsi_eh_flush_done_q() such that sorting happens just before reinserting. - Removed the scsi_cmd_retry_allowed() call from scsi_check_sense() to make sure that the retry counter is adjusted once per retry instead of twice. Changes compared to v3: - Restored the patch that introduces QUEUE_FLAG_NO_ZONE_WRITE_LOCK. That patch had accidentally been left out from v2. - In patch "block: Introduce the flag REQ_NO_ZONE_WRITE_LOCK", improved the patch description and added the function blk_no_zone_write_lock(). - In patch "block/mq-deadline: Only use zone locking if necessary", moved the blk_queue_is_zoned() call into dd_use_write_locking(). - In patch "fs/f2fs: Disable zone write locking", set REQ_NO_ZONE_WRITE_LOCK from inside __bio_alloc() instead of in f2fs_submit_write_bio(). Changes compared to v2: - Renamed the request queue flag for disabling zone write locking. - Introduced a new request flag for disabling zone write locking. - Modified the mq-deadline scheduler such that zone write locking is only disabled if both flags are set. - Added an F2FS patch that sets the request flag for disabling zone write locking. - Only disable zone write locking in the UFS driver if auto-hibernation is disabled. Changes compared to v1: - Left out the patches that are already upstream. - Switched the approach in patch "scsi: Retry unaligned zoned writes" from retrying immediately to sending unaligned write commands to the SCSI error handler. Bart Van Assche (7): block: Introduce the flag QUEUE_FLAG_NO_ZONE_WRITE_LOCK block/mq-deadline: Only use zone locking if necessary scsi: core: Retry unaligned zoned writes scsi: scsi_debug: Support disabling zone write locking scsi: scsi_debug: Support injecting unaligned write errors scsi: ufs: Split an if-condition scsi: ufs: Disable zone write locking block/mq-deadline.c | 24 +++++++++++++++------ drivers/scsi/scsi_debug.c | 20 ++++++++++++++++- drivers/scsi/scsi_error.c | 37 ++++++++++++++++++++++++++++++++ drivers/scsi/scsi_lib.c | 1 + drivers/scsi/sd.c | 3 +++ drivers/ufs/core/ufshcd.c | 45 ++++++++++++++++++++++++++++++++++++--- include/linux/blkdev.h | 11 ++++++++++ include/scsi/scsi.h | 1 + 8 files changed, 132 insertions(+), 10 deletions(-)